I have a Bushmaster Carbon 15 in great shape has less than 500 rnds put through it. Asking $750 or make me an offer. Here are the specs from Bushmaster's wesite. The Bushmaster C15 M4 Type Carbines are a unique hybridization of traditional AR-15 type features with space-age Carbon 15 composite molded Receivers for light weight and rugged durability. Lightweight Carbon 15 Composite Receivers 40% stronger and 40% lighter than comparable aircraft aluminum receivers unaffected by moisture will not corrode matte black throughout (no surface finish to wear off). Upper Receiver includes anodized aluminum Picatinny rail for unlimited sight, scope or optics mounting. 16" M4 Profile Barrel chambered for 5.56mm NATO/.223 Rem. caliber, Chrome Lined in both Bore and Chamber for long wear and ease of maintenance standard threaded muzzle (1/2 x 28 T.p.I.) fitted with Izzy Flash Suppressor. Barrel finish is mil. spec. Manganese Phosphate for protection against corrosion and rust. Front Sight is AR Type Base with Post adjustable for elevation. Rear Sight is a B.M.A.S. Dual Aperture Flip-up adjustable for windage. 6 Position TeleStock offers light weight, carrying ease and quick handling. Carbine length Handguards have internal aluminum shields to protect against heat build-up in rapid fire sequences. Shipped in a Lockable Hard Case with Operation and Safety Manual, 30 Round Magazine and Black Web Sling.